[ericfox]

Just finished changing timing belt, alternator belt and power steering belt on my 2002 highlander V6 engine... turned the car on for about a minute and it ran perfectly quiet... then a couple minutes later I turned on again and there was BAD screeching... the screeching was always there, but it did vary a little in intensity...

The power steering goes from pump to crank pulley, the alternator belt goes from alt to compressor to crank... each belt has its own manual tensioner....the guy at dealership told me to tighten belts until I cant twist them more than 1/4-1/2 turns... but maybe he thought I had a serpentine belt... maybe these belts have to be very tight?

could be a bearing too... but I hope not...

Anyone have any ideas of where I should start?

It is loud, so figuring out where it is coming from may be difficult because of the level of noise and the location being difficult to see very well

the alternator belt seems to be hot after running for a minute... but I dont know why it ran great the first time I started...

Thanks for any suggestions!

 

[CWH5]

Remove belts one at a time and restart each time untill you find a ofending belt then look at alinement of belts (check to make sure you have tightend seated the crankshaft pully), If the squeaking belt is found and no problem are seen retighten them and see what happens, If removing all the drive belts does not stop the squeak then your gona need to remove the cover and check a few things. First common mistake, did you intall the crank timing pully guide before you put the low cover on?(this is often left out and may sound fine for alittle while untill the belt walks out towrd the timing cover) and if so did you install it backwards. 2 if you removed the ideller pully did you center it before tightening and is it tight, 3 Did the washer behind the tensioner pully drop when you removed it to collaps the tentioner and not get put back.

 

[ericfox]

Remove belts one at a time and restart each time untill you find a ofending belt then look at alinement of belts (check to make sure you have tightend seated the crankshaft pully), If the squeaking belt is found and no problem are seen retighten them and see what happens, If removing all the drive belts does not stop the squeak then your gona need to remove the cover and check a few things. First common mistake, did you intall the crank timing pully guide before you put the low cover on?(this is often left out and may sound fine for alittle while untill the belt walks out towrd the timing cover) and if so did you install it backwards. 2 if you removed the ideller pully did you center it before tightening and is it tight, 3 Did the washer behind the tensioner pully drop when you removed it to collaps the tentioner and not get put back.

well... I will definately take the belts off one at a time tonight when I get home... what do you mean about tightend seated the crank pully? I put 159ft lb on the crank pulley bolt like the manual said if thats what you mean...
I did put the guide back on... I thought I knew which side to go toward me because I labeled it, but then I was confirmed by seeing the outline of the sprocket on the backside of the guide where it used to mate up... so thats good...
I dont have any idle pulley... well kind of... I have 2 idle bearings that the belt rides on so I guess its a pulley with no sides.... I didnt center either idle bearing, but they really didnt have any way of centering that I saw... one fit over a stud and the other had a bolt through the middle... and that seemed like it should center them well...thoughts?

I dont have any tensioner pulley... just 2 manual adustments- the power steering just has a bolt that moves up and down in a track and the pump pulley is the pivot point and the alternator is the pivot for that belt and is adjusted by screwing or unscrewing a bolt that raises or lowers the other side of the alternator...

thank you for all suggestions

 

[ericfox]

got it thanks

tightened the alternator belt tighter... its pretty dang tight.... and no squeel... very nice!

 

[CWH5]

Very nice indeed, My luck would have be back in the timing cover again for whatever reason.